simplified prefix removal, removed unnecessary if-else statements

internal/cache/cache.go

@@ -175,11 +175,7 @@ const MaxCacheAge = 30 * 24 * time.Hour
 
 func validCacheDirName(s string) bool {
 	r := regexp.MustCompile(`^[a-fA-F0-9]{64}$`)
-	if !r.MatchString(s) {
-		return false
-	}
-
-	return true
+	return r.MatchString(s)
 }
 
 // listCacheDirs returns the list of cache directories.

internal/cache/file.go

@@ -214,9 +214,5 @@ func (c *Cache) Has(h restic.Handle) bool {
 	}
 
 	_, err := fs.Stat(c.filename(h))
-	if err == nil {
-		return true
-	}
-
-	return false
+	return err == nil
 }